To have extreme skills.
To be really cool.
The origin of the word "Hamhuisy" comes from Dan Hamhuis. Hamhis is a Canadian professional ice hockey defenceman. Dan has played defense for the Vancouver Canucks since 2010 and has played in the NHL since 2003.

He is a fan favourite and the city of Vancouver has adapted to this word when talking about, not only hockey, but everyday situations.